[PATCH] wwwdocs: Add D front-end section for GCC 11 changes

[Iain Buclaw]

Excerpts from Iain Buclaw's message of May 19, 2021 5:41 pm:
> Hi,
> 
> This is a belated patch which covers some of the more notable changes
> that have gone into the GCC 11 release of the D front-end.
> 
> Ran this through the W3 validator and no new warnings are generated.
> 
> I will go through it a few more times to see if there's anything more
> that can be made more succinct, otherwise are there any wording
> suggestions before I commit this?
> 
[--snip--]
> +      <li><code>-fweak-templates</code>, added to control whether declarations
> +	that can be defined in multiple objects as should be emitted as weak
> +	symbols. The default is to emit all symbols with extern linkage as
> +	weak, unless the target lacks support for weak symbols.
> +      </li>

Removed "as" in "as should", which was a small grammar mistake
introduced when rephrasing the sentence.

With that done, I've gone ahead and pushed this to mainline.

Iain.